<template>
    <div class="todo-header">
        <input type="text" placeholder="请输入你的任务名称，按回车键确认"
               :v-model="title"
               @keyup.enter="add"/>
    </div>
</template>

<script>
    import {nanoid} from 'nanoid'

    export default {
        name: "MyHeader",
        props: ['addTodo'],
        data() {
            return {
                title: ''
            }
        },
        methods: {
            add(e) {
                if (!e.target.value.trim())
                    return alert('输入不能为空');
                // 将用户的输入包装成为一个todoObj对象
                const todoObj = {
                    id: nanoid(),
                    title: e.target.value,
                    done: false
                };
                // console.log(todoObj)
                //通知APP组件添加
                this.addTodo(todoObj);
                //清空
                e.target.value = ''
            }
        }
    }
</script>

<style scoped>
    /*header*/
    .todo-header input {
        width: 560px;
        height: 28px;
        font-size: 14px;
        border: 1px solid #ccc;
        border-radius: 4px;
        padding: 4px 7px;
    }

    .todo-header input:focus {
        outline: none;
        border-color: rgba(82, 168, 236, 0.8);
        box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075), 0 0 8px rgba(82, 168, 236, 0.6);
    }
</style>
